Thanks for the info guys, from the appearance of the knife i already thought it came from the 50's.

BTW: this is how the knife looks now.
I renewed the edge on my Tormek T7 wet sharpener, and i'm still in the process of giving the rest of the blade somewhat of a satin finish.
The fiber in the guard and below the butt had swollen a bit, so i sanded it flush with the brass and did some polishing: